You can turn off Outlook notifications through the app's general settings if your notifications become distracting or disruptive.

If the notifications are not working in Outlook on the web (OWA) , make sure your in-app notification settings are enabled, and then use these fixes.

Although Windows 11 doesn't have a master switch to turn off notifications, it does include multiple ways to make notifications less annoying.

If you want to turn off all of your notifications, you need to disable them on each device individually. Luckily, many devices have a similar process.